no. 2
Birational moduli and nonabelian cohomology
Compositio Mathematica, Tome 68 (1988) no. 2, pp. 175-202.
partie suivante Birational moduli and nonabelian cohomology, II 
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     pages = {175--202},
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     number = {2},
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     language = {en},
     url = {http://www.numdam.org/item/CM_1988__68_2_175_0/}
}
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Buium, A. Birational moduli and nonabelian cohomology. Compositio Mathematica, Tome 68 (1988) no. 2, pp. 175-202. http://www.numdam.org/item/CM_1988__68_2_175_0/

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